[ISSUE] databricks_model_serving resource failing to update about terraform-provider-databricks

[alexott]

@tiagoshin, can you provide sample values for all variables? Also, your TF template doesn't have any value for workload_type, workload_size, etc.

[tiagoshin]

Sure, the variables are like:

• var.environment = "dev"
• var.service = "service-name"
• var.databricks_scale_to_zero_enabled = "true"
• var.databricks_min_provisioned_throughput = 3600
• var.databricks_max_provisioned_throughput = 7200

Also, your TF template doesn't have any value for workload_type, workload_size, etc.

That's the point! The new Databricks model serving model is not based on workload size and type. For e.g., we cannot even define them on UI. Instead, we use min_provisioned_throughput and max_provisioned_throughput, so the hardware is assigned by Databricks.
So, if I'm not defining those values, why does Terraform want to change them?

[alexott]

@tiagoshin

Can you attach logs as per first section of troubleshooting guide?

Regarding workload_type and workload_size - it looks like they are set on the backend, so they are populated in the TF state, and when apply happens, then TF figures out that they aren't set, and tries to reset them. To avoid resetting of that values they need to be correctly marked in the code as computed. Or they should be not populated by the backend...

[tiagoshin]

@alexott How do we mark them as computed?

[clintbxtreme]

To test I also tried defining workload_type and workload_size but terraform is still wanting to change the scale_to_zero_enabled flag even tho it was previously applied initially:

  ~ resource "databricks_model_serving" "chat_model" {
        id                  = "name of the resource"
        name                = "name of the resource"
        # (1 unchanged attribute hidden)
      ~ config {
          ~ served_entities {
                name                       = "name of the resource"
              ~ scale_to_zero_enabled      = false -> true
                # (7 unchanged attributes hidden)
            }
            # (1 unchanged block hidden)
        }
    }

This also resulted in the same error as above